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The photograph shows a potato with powdery scab disease - Edexcel - GCSE Biology - Question 2 - 2015 - Paper 1
Question 2
The photograph shows a potato with powdery scab disease. This disease causes damage to the potato skin. In an investigation, equal numbers of two varieties of pota... show full transcript
Worked Solution & Example Answer:The photograph shows a potato with powdery scab disease - Edexcel - GCSE Biology - Question 2 - 2015 - Paper 1
Step 1
Calculate the percentage of Pentland Javelin potatoes affected by powdery scab disease
Answer
To find the percentage of Pentland Javelin potatoes affected by powdery scab disease, we use the formula:
ext{Percentage} = rac{ ext{Number of affected potatoes}}{ ext{Total number of harvested potatoes}} imes 100
From the table, the number of Pentland Javelin potatoes affected is 140, and the total number harvested is 350. Thus, the calculation becomes:
ext{Percentage} = rac{140}{350} imes 100
Calculating this gives:
ext{Percentage} = rac{140}{350} imes 100 = 40 ext{%}
Therefore, 40% of Pentland Javelin potatoes are affected by the powdery scab disease.